Runners up: A Vengeful Longing by RN Morris and The Likeness by Tana French.
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Here's what they said about AVL:
Morris resurrects one of literature’s all-time greatest characters: Porfiry Petrovich, the detective from Dostoevsky’s Crime and Punishment. The result reads like an episode of Columbo, but with feverish Russian psychology and the filthy overflowing canals of 1868 St. Petersburg.